League City, TX weather in September
Expect hot, oppressively humid weather with frequent rain in League City in September, with highs near 88°F and lows near 72°F. Rain falls on about 11 days.
- Normal high
- 88°F
- Normal low
- 72°F
- Wet days
- 11
- 7.3 in total
- Muggy days
- 25
- dew point 65°F+
How September changes from start to finish
| September 1 | September 30 | |
|---|---|---|
| Normal high | 91°F | 86°F |
| Normal low | 75°F | 68°F |
| Chance of a wet day | 38% | 30% |
| Sunrise / sunset | 6:57 am / 7:42 pm | 7:13 am / 7:07 pm |
| Daylight | 12.8 h | 11.9 h |
Chance of a wet day: average for the first and last 7 days of the month. Times are local clock time (Central Time).
A typical September day
- 6 am72°Fdew point 69°F
- 9 am80°Fdew point 70°F
- Noon86°Fdew point 68°F
- 3 pm87°Fdew point 67°F
- 6 pm83°Fdew point 69°F
- 9 pm77°Fdew point 70°F
NOAA hourly normals (local standard time) from Houston Intercont Airport (36 mi away); average wind 6 mph; clear or few clouds in 24% of daytime hours, mostly cloudy or overcast in 44%.
What kind of days to expect
- Comfortable dayshigh 65-80°F and dew point under 60°F1 of 30
- Beach dayshigh 80-95°F, under 0.05 in of rain, afternoon wind under 15 mph20 of 30
- Hot dayshigh 90°F or more11 of 30
- Muggy daysdaily mean dew point 65°F or more25 of 30
- Wet daysat least 0.01 in of rain or melted snow11 of 30
- Notable rainat least 0.10 in7 of 30
- Freezing nightslow 32°F or below0 of 30
Average days per September, counted from daily records for each year 1991-2020.
Rain in September
Normal precipitation is 7.3 in; a dry September brings about 3.4 in and a wet one about 9.2 in (25th and 75th percentiles). About 4 days bring half an inch or more, and about 2 an inch or more.
How September varies from year to year
- Warmest September, 1991-20202011: average high 93°F
- Coolest September1991: average high 85°F
- Wettest September2018: 24.6 in
- Driest September2017: 1.0 in
- Highest reading106°F (September 4, 2000)
- Lowest reading50°F (September 23, 1999)
From the station's daily records with NOAA quality flags removed; most recent date shown when a reading repeats.
September compared with August and October
| August | September | October | |
|---|---|---|---|
| Normal high | 92°F | 88°F | 82°F |
| Normal low | 76°F | 72°F | 63°F |
| Wet days | 10 | 11 | 8 |
| Comfortable days | 0 | 1 | 7 |
| Daylight | 13.2 h | 12.3 h | 11.4 h |
Highs change by -4°F from August and -6°F into October.
Nearby alternatives in September
- Drier: Conroe, TX60 mi · high 90°F · 7 wet days
How League City ranks in September
- Normal high92nd warmest of 378 cities; 29th of 38 in Texas
- Wet days330th driest of 378
- Comfortable days298th most of 342
What to pack for League City in September
- Light, breathable clothing – highs near 88°F and about 25 muggy days
- A rain jacket or umbrella – rain on about 11 days
- A swimsuit – about 20 beach days
Heating and cooling
September has 0 heating degree days and 453 cooling degree days (base 65°F), 10% of the year's total heating and cooling demand.
Questions
How hot is League City in September?
The normal high is 88°F and the normal low is 72°F. From 1991 to 2020 the hottest September reading was 106°F (September 4, 2000).
Does it rain a lot in League City in September?
About 11 days in September have at least 0.01 in of precipitation, and the normal total is 7.3 in. The wettest September in 1991-2020 was in 2018 (24.6 in); the driest was in 2017 (1.0 in).
Is September a good time to visit League City?
September ranks 10th of 12 months on our comfort score for League City (40 out of 100). It has about 1 comfortable day and about 11 days at 90°F or hotter. The best months are March, April and November.
Where the numbers come from
- Temperature, rain, snowfall, snow depth and frost dates: Houston Nwso (USC00414333), 2.6 mi SSE of the city center, 19 ft . NOAA normals and daily records, 1991-2020.
- Humidity and wind by hour and cloud cover: Houston Intercont Airport (USW00012960), 36 mi NNW of the city center, 95 ft (76 ft higher than the city). NOAA normals and daily records, 1991-2020.
- Daily humidity and wind: Ellington Field Airport (722436-12906), 8.7 mi NNW of the city center, 32 ft . Hourly observations, 1991-2020.